<script>
import { h } from 'vue'

export default {
  data() {
    return {
      counter: 0
    }
  },
  render() {
    return h('div', { class: 'app' }, [
      h('h2', null, `Render 函数的计数器: ${this.counter}`),
      h(
        'button',
        {
          onClick: () => this.counter++
        },
        '+1'
      ),
      h(
        'button',
        {
          onClick: () => this.counter--
        },
        '-1'
      )
    ])
  }
}
</script>
